/**
 *  Copyright (C) 2008-2013  Telosys project org. ( http://www.telosys.org/ )
 *
 *  Licensed under the GNU LESSER GENERAL PUBLIC LICENSE, Version 3.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *          http://www.gnu.org/licenses/lgpl.html
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package org.telosys.persistence.dbfeatures;

public interface DbFeatures {

    public final static String DEFAULT_FOR_UPDATE_STRING = "FOR UPDATE" ;
    
	//===============================================================================
	// Sequences management 
	//===============================================================================
	/**
	 * Returns true if the database supports sequences
	 * @return
	 */
	public boolean supportsSequences() ;
	

	/**
	 * Returns the SQL request to be used to retrieve the next value of the given sequence name
	 * @param sequenceName
	 * @return
	 */
	public String getSqlForSequenceNextVal(String sequenceName) ;

	
	//===============================================================================
	// Lock management (with select for update)
	//===============================================================================
	/**
	 * Returns the "FOR UPDATE" string, or null if not supported
	 * @return
	 */
	public String getForUpdateString();
}
